The production of 2D nanosheets (2D NSs) with all sizes (1–100 nm) and few (<10) layers is highly desired but remains great challenge. Herein, the top‐down production of molybdenum disulfide (MoS2) NSs with wide‐range (161–10 nm) controlled sizes is reported. Considering the recently achieved MoS2 quantum sheets (QSs) with sizes of ≈2 nm, full‐scale NSs of MoS2 are successfully produced. The top‐down method combines silica‐assisted ball‐milling and sonication‐assisted solvent exfoliation. Ball‐milling with controlled time enables the production of multiscale NSs with varying distributions, which are then precisely separated by cascade centrifugation. Multiple spectroscopic techniques reveal the dramatic size dependence, indicating prominent quantum confinement and edge effects of the MoS2 NSs. The NSs‐poly(methyl methacrylate) (PMMA) hybrid thin films demonstrate strong size effects in nonlinear saturation absorption (NSA). Both (absolute) modulation depths and saturation intensities can be broadly modulated by simple variation of the NS sizes. With the sizes down from 161 to 10 nm, the modulation depths are increased from 27.0% to 51.3% and the saturation intensities are decreased from 33 419 to 21.2 kW cm−2 (3341.9–2.12 nJ cm−2). The work greatly facilitates the mass production and full exploration of 2D NSs with all sizes.

A series of mesoporous materials of SBA-16 were in situ incorporated into ZSM-5 crystallites via a two-step self-assemble method, and hydrodesulfurization (HDS) catalysts were prepared on the corresponding ZSM-5/SBA-16 (ZS) composites. The characterization results indicated that ZSM-5 nanoseeds were fabricated into the silica framework of the ZS composites, and the three-dimensional Im3m cubic structure of SBA-16 was retained simultaneously. In addition, the ZS series materials possessed open pores and large surfaces, which would facilitate the diffusion of reactants in the mesoporous channels. Moreover, the introduction of ZSM-5 seeds into composites could enhance the acidities of supports. As a result, the NiMo/ZS series catalysts exhibited high activities for DBT HDS processes. The NiMo/ZS-160 catalyst exhibited the highest catalytic efficiency (96.5%), which was apparently attributed to the synergistic contributions of the physicochemical properties of ZS supports and the dispersion states of active metals. Correspondingly, DBT HDS reactions over the NiMo/ZS series catalysts mainly proceeded via a hydrogenation desulfurization route that benefitted from the enhanced acidities especially the total Brønsted acid.

Mass production of semiconductor quantum dots (QDs) from bulk materials is highly desired but far from satisfactory. Herein, we report a general strategy capable of mechanically tailoring semiconductor bulk materials...